Which outcome arises during prolonged, repeated firing of early cast iron hand cannons?

💡 Explanation

Bore erosion increases with repeated firing cycles causing progressive bore growth via thermal shock and fatigue. Micro-crack expansion via thermal fatigue exceeds material limits, therefore the barrel expands, rather than achieving increased velocity or corrosion resistance under repeated stress.

• Which outcome accelerated decline in Mughal-era pietra dura?
• Which consequence arises when longship sails lost strength?
• Which limit results when pre-telescope astronomers measured star positions using parallax?
• Which risk increased when 18th century shipwrights rapidly expanded shipbuilding using unseasoned timber?
• Which outcome resulted when the Tay Bridge design omitted sufficient cross bracing against lateral forces?
• Which consequence arises faster when Viking longships experience prolonged exposure to saltwater?